from flask import Blueprint, render_template, redirect, url_for, flash, request, abort, current_app
from flask_login import current_user, login_required
from werkzeug.utils import secure_filename
from app import db
from models import User, Topic, Post
from forms import EditProfileForm, ChangePasswordForm
import os
from datetime import datetime
import logging
from PIL import Image
import uuid

# Set up logger
logger = logging.getLogger(__name__)

# Create blueprint
user_bp = Blueprint('user', __name__, url_prefix='/user')

def save_avatar(avatar_file):
    """Save the avatar image and return the filename"""
    # Generate a unique filename
    filename = secure_filename(f"{uuid.uuid4().hex[:8]}_{avatar_file.filename}")
    
    # Define the upload path
    upload_dir = os.path.join(current_app.static_folder, 'uploads', 'avatars')
    filepath = os.path.join(upload_dir, filename)
    
    # Resize and save the image
    img = Image.open(avatar_file)
    img.thumbnail((150, 150))  # Resize to max dimensions while preserving aspect ratio
    img.save(filepath)
    
    return filename

@user_bp.route('/profile/<username>')
def profile(username):
    user = User.query.filter_by(username=username).first_or_404()
    
    # Get user's topics with pagination
    page = request.args.get('page', 1, type=int)
    per_page = 10
    
    topics = Topic.query.filter_by(author_id=user.id)\
        .order_by(Topic.created_at.desc())\
        .paginate(page=page, per_page=per_page, error_out=False)
    
    # Get user's recent posts
    recent_posts = Post.query.filter_by(author_id=user.id)\
        .order_by(Post.created_at.desc())\
        .limit(5)\
        .all()
    
    return render_template('user/profile.html', 
                          user=user, 
                          topics=topics,
                          recent_posts=recent_posts)

@user_bp.route('/edit_profile', methods=['GET', 'POST'])
@login_required
def edit_profile():
    form = EditProfileForm()
    
    if form.validate_on_submit():
        # Update user profile
        if form.avatar.data:
            try:
                filename = save_avatar(form.avatar.data)
                current_user.avatar = filename
            except Exception as e:
                logger.error(f"Avatar upload error: {str(e)}")
                flash('Une erreur est survenue lors du téléchargement de votre avatar.', 'danger')
        
        current_user.signature = form.signature.data
        current_user.location = form.location.data
        current_user.website = form.website.data
        current_user.bio = form.bio.data
        
        db.session.commit()
        flash('Votre profil a été mis à jour !', 'success')
        return redirect(url_for('user.profile', username=current_user.username))
    
    # Pre-fill form with current user data
    if request.method == 'GET':
        form.signature.data = current_user.signature
        form.location.data = current_user.location
        form.website.data = current_user.website
        form.bio.data = current_user.bio
    
    return render_template('user/edit_profile.html', form=form)

@user_bp.route('/change_password', methods=['GET', 'POST'])
@login_required
def change_password():
    form = ChangePasswordForm()
    
    if form.validate_on_submit():
        # Check if current password is correct
        if not current_user.check_password(form.current_password.data):
            flash('Le mot de passe actuel est incorrect.', 'danger')
            return render_template('user/change_password.html', form=form)
        
        # Update password
        current_user.set_password(form.password.data)
        db.session.commit()
        
        flash('Votre mot de passe a été mis à jour !', 'success')
        return redirect(url_for('user.profile', username=current_user.username))
    
    return render_template('user/change_password.html', form=form)

@user_bp.route('/posts')
@login_required
def user_posts():
    page = request.args.get('page', 1, type=int)
    per_page = 20
    
    posts = Post.query.filter_by(author_id=current_user.id)\
        .order_by(Post.created_at.desc())\
        .paginate(page=page, per_page=per_page, error_out=False)
    
    return render_template('user/posts.html', posts=posts)